Blue, try to gargle with Betadine liquid - 50-50 betadine-water. My experience has it better than salt water. An anti-allergy perhaps to open your breathing channels. I find Allegra 120 works well. I don't know if you can get it there or if you need a prescription to get it. I like it because it doesn't cause drowsiness. Eucalyptus oil helps temporarily.
There are more specific anti-allergies, but you will need to find out what you get there.
Get well soon. I hope you are well enough to enjoy Chritmas.